Convert Pounds (lb) to Kilograms (kg)
Enter a value below to convert Pounds (lb) to Kilograms (kg).
Conversion:
1 Pounds (lb) = 0.45359237 Kilograms (kg)
How to Convert Pounds (lb) to Kilograms (kg)
1 lb = 0.45359237 kg
1 kg = 2.2046226218 lb
Example: convert 15 Pounds (lb) to Kilograms (kg):
25 lb = 11.33980925 kg
Pounds (lb) to Kilograms (kg) Conversion Table
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 0.01 lb | 0.0045359237 kg |
| 0.1 lb | 0.045359237 kg |
| 1 lb | 0.45359237 kg |
| 2 lb | 0.90718474 kg |
| 3 lb | 1.36077711 kg |
| 5 lb | 2.26796185 kg |
| 10 lb | 4.5359237 kg |
| 20 lb | 9.0718474 kg |
| 50 lb | 22.6796185 kg |
| 100 lb | 45.359237 kg |
| 1000 lb | 453.59237 kg |
Pounds (lb)
Definition
A pound (lb) is an imperial unit of mass equal to 16 ounces or approximately 453.592 grams. The abbreviation 'lb' comes from the Latin 'libra'.
History
The pound has ancient Roman origins ('libra pondo' meaning 'a pound by weight'). The modern avoirdupois pound was standardized in England in the 14th century and was internationally defined as exactly 0.45359237 kg in 1959.
Current use
Pounds are the primary weight unit in the United States for body weight, grocery products, newborn weights, and boxing weight classes. They are also used in the UK alongside kilograms.
Kilograms (kg)
Definition
A kilogram (kg) is the SI base unit of mass, equal to 1,000 grams. Since 2019, it is defined by the Planck constant rather than a physical artifact.
History
The kilogram was established in 1795 during the French Revolution as the mass of one liter of water. From 1889 to 2019, it was defined by the International Prototype of the Kilogram (a platinum-iridium cylinder in Paris). The 2019 redefinition linked it to the Planck constant for improved precision.
Current use
Kilograms are the universal standard for body weight, grocery products, luggage allowances, industrial materials, and scientific measurements. It is the base unit of mass in all scientific and most commercial contexts worldwide.